package com.sj.purchase.util.excel;

import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.util.CellRangeAddress;

/**
 * 
* 获取合并单元格工具
* @date 2016年8月6日 下午2:07:47
*
 */
public class ExceMergedRegion {

	/**
	 * 获取合并单元格的值
	 * 
	 * @param sheet
	 * @param row
	 * @param column
	 * @return
	 */
	public String getMergedRegionValue(Sheet sheet, int row, int column) {
		int sheetMergeCount = sheet.getNumMergedRegions();

		for (int i = 0; i < sheetMergeCount; i++) {
			CellRangeAddress ca = sheet.getMergedRegion(i);
			int firstColumn = ca.getFirstColumn();
			int lastColumn = ca.getLastColumn();
			int firstRow = ca.getFirstRow();
			int lastRow = ca.getLastRow();

			if (row >= firstRow && row <= lastRow) {
				if (column >= firstColumn && column <= lastColumn) {
					Row fRow = sheet.getRow(firstRow);
					Cell fCell = fRow.getCell(firstColumn);

					return getCellValue(fCell);
				}
			}
		}

		return null;
	}

	/**
	 * 判断指定的单元格是否是合并单元格
	 * 
	 * @param sheet
	 * @param row
	 * @param column
	 * @return
	 */
	public boolean isMergedRegion(Sheet sheet, int row, int column) {
		int sheetMergeCount = sheet.getNumMergedRegions();

		for (int i = 0; i < sheetMergeCount; i++) {
			CellRangeAddress ca = sheet.getMergedRegion(i);
			int firstColumn = ca.getFirstColumn();
			int lastColumn = ca.getLastColumn();
			int firstRow = ca.getFirstRow();
			int lastRow = ca.getLastRow();

			if (row >= firstRow && row <= lastRow) {
				if (column >= firstColumn && column <= lastColumn) {

					return true;
				}
			}
		}

		return false;
	}

	/**
	 * 获取单元格的值
	 * 
	 * @param cell
	 * @return
	 */
	public String getCellValue(Cell cell) {
		if (cell == null)
			return "";
		if (cell.getCellType() == Cell.CELL_TYPE_STRING) {
			return cell.getStringCellValue();

		} else if (cell.getCellType() == Cell.CELL_TYPE_BOOLEAN) {
			return String.valueOf(cell.getBooleanCellValue());

		} else if (cell.getCellType() == Cell.CELL_TYPE_FORMULA) {
			return cell.getCellFormula();

		} else if (cell.getCellType() == Cell.CELL_TYPE_NUMERIC) {
			return String.valueOf(cell.getNumericCellValue());
		}

		return "";
	}

}
